Historic Earthquakes

Magnitude 7.6 SCOTIA SEA
2003 August 04 04:37:20 UTC

The earthquake occurred on the boundary between the Scotia plate and the
Antarctic plate. In the epicentral region, the Scotia Sea plate is moving to the west-northwest with respect to the
Antarctic plate. The relative velocity between the two plates is not well determined but is likely to be about 1
cm/y. The overall boundary is a transform-fault boundary, involving predominantly strike-slip faulting, although
prior normal-faulting earthquakes have also occurred.